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E34 (1989 - 1995)

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  #1  
Old 11-30-2014, 12:17 PM
Lino Martina Lino Martina is offline
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518i (M43b18) cranks, does not start

Good day all,

So i recently was abandoned in the rain by my at that point not so trust and never fast stallion,.. Here is in detail what happened.

Driving in pouring rain,. car stalls, won't start up. Cranks,. does not start.
Towed it home, testing begins,. fuel in tank, pump not priming and no spark, checked fuses relays etc etc. Noticed no 12v on fuse 23,.. this plus no spark,.. my guess is the crank position sensor or pulse sensor.

Went to the dealer got a new one,. installed it,. and now the mystery commences,.. fuel is being delivered ( i know this for i took a hose of and now my cat who was sitting fascinated on the passenger side relay/ecu box reeks like fuel . whoeps, flammable kitty.
When trying to crank the engine, it cranks,. TRIES to sputter,. makes a put put noise ( hollow sounding put put) but never starts.

I know the timing chain has not broken, i mean,. the whole shebang of pulleys n stuff turn,... or could it have jumped? Does not make sense to me, for why would then the fuel pump not prime and spark be eliminated ( CPS symptoms)

Now my best guess is that the cps somehow is not positioned close enough to the toothed wheel. I see quite a gap of more then 1 mm (workbook clearance),. BUT i see no way in how to position or adjust its bracket,..

Does anyone here have a clue on how to solve this mystery? My inspiration is getting low, and my cat hates me now

Thank you in advance
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  #2  
Old 11-30-2014, 12:56 PM
Alpina535I Alpina535I is offline
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You are in the wrong section. This is for e34. I am sure one of the mods will move it.

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  #3  
Old 11-30-2014, 01:31 PM
aalpine1 aalpine1 is offline
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http://www.bmwe34.net/E34main/Other/Models.htm

Try to unplug the cps to see if the car will start. If that does not help, try to unplug the maf and try to start the car again.

DO you have a spare coil to test ?

Any codes ?
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  #4  
Old 11-30-2014, 03:22 PM
Lino Martina Lino Martina is offline
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Mein Auto: e34 518i
@Alpina535i

It is a e34... a slow one,.. but e34 for sure

@Aalpine1
Fun part its a euro model,.. so the stomp test does not work,..
The maf has been unplugged even though it is a new one i bought a few months ago, trying to start without the cps is something i have not done yet. Does that even work? For I understood that if that signal does not come through you get no fuel.
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  #5  
Old 11-30-2014, 03:33 PM
aalpine1 aalpine1 is offline
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Maybe you know someone with a code reader ....

Do you have a spark when your try to start the engine ? Is the fuel pump working when you turn the key ? Do you have a different main relay ?
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  #6  
Old 11-30-2014, 03:56 PM
Lino Martina Lino Martina is offline
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spark is there, fuel also there with high pressure ( hence the wet kitty )

So I am somehow thinking either a faulty cps ( even though brand new from dealer ) , or a wrong cps clearance,.. OR a faulty dme
In case of a dme,.. I'm in a spot for I live on a Caribbean island where only 3 518i's were sold so no store has anything in stock haha

nice weather though
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  #7  
Old 11-30-2014, 04:13 PM
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BMWFatherFigure BMWFatherFigure is offline
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You are right - the fuel pump only powers up when there are CPS pulses. That tends to suggest that the CPS is fine. Do you get consistant spark? When the car got wet which part got wet to stop it? Is that part now water damaged? Is the factory cover on the distributer cap? Are the plug leads now arcing out?
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I've just changed my wiper blades and now my reverse lights don't work. Should I change my fuel pump relay?
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  #8  
Old 11-30-2014, 04:19 PM
Lino Martina Lino Martina is offline
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spark is there, fuel also there with high pressure ( hence the wet kitty )

So I am somehow thinking either a faulty cps ( even though brand new from dealer ) , or a wrong cps clearance,.. OR a faulty dme
In case of a dme,.. I'm in a spot for I live on a Caribbean island where only 3 518i's were sold so no store has anything in stock haha

nice weather though
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  #9  
Old 11-30-2014, 05:43 PM
Lino Martina Lino Martina is offline
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Quote:
Originally Posted by BMWFatherFigure View Post
You are right - the fuel pump only powers up when there are CPS pulses. That tends to suggest that the CPS is fine. Do you get consistant spark? When the car got wet which part got wet to stop it? Is that part now water damaged? Is the factory cover on the distributor cap? Are the plug leads now arcing out?
I was driving in the rain,. when I got back to the car to tow it home, it was a day later, so really couldnt check for wet parts.
The m43 does not seem to have a distributor cap as far as I can see.
What do you mean by arcing plug leads?

One thing I did notice just now,.. when I turn the ignition key,. i see no check engine light coming on,. all other lights work,. except that one,.. so weird ( could be broken bulb though )
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  #10  
Old 11-30-2014, 05:58 PM
Alpina535I Alpina535I is offline
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Well you learn somthing new everyday.

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  #11  
Old 11-30-2014, 06:29 PM
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E34ZombieHunter E34ZombieHunter is offline
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What year E34?
Have you pulled the plugs to see how they look/clean them?
Have you tried starting fluid to get it to maybe fire and let it try to catch itself?
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  #12  
Old 12-01-2014, 12:13 AM
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BMWFatherFigure BMWFatherFigure is offline
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OK, so I'm old school. Does the engine have Coil Packs over each plug or only one coil? If it has one coil then it has a distributer (front of the cam shaft). If he/you have fuel pressure the F/P is running so he must have CPS pulses? That leaves spark. If no spark the go back to my other post. I keep wondering what got wet to stop the car. The CPS can be checked with a DVM for 500ohm resistance.
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I've just changed my wiper blades and now my reverse lights don't work. Should I change my fuel pump relay?
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  #13  
Old 12-01-2014, 09:08 AM
capricornbmw capricornbmw is offline
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Quote:
Originally Posted by BMWFatherFigure View Post
You are right - the fuel pump only powers up when there are CPS pulses. That tends to suggest that the CPS is fine. Do you get consistant spark? When the car got wet which part got wet to stop it? Is that part now water damaged? Is the factory cover on the distributer cap? Are the plug leads now arcing out?

No the fuel pump powers up when there is current. The spark plugs and the fuel injectors fire only when there's a cps pulse.

OP, just check for spark. Hold a plug in a pulled ignition lead against body ground and crank and see if there's a spark. Wrap your hand good with cloth first to insulate yourself. If there isn't any spark then your cps is suspect and in your case your dizzy cap and leads too you need to troubleshoot further.
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  #14  
Old 12-01-2014, 10:34 AM
Lino Martina Lino Martina is offline
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Ok,

There is spark,. that is consistent, there is fuel, also consistent and with enough pressure.
Relays checked, fuses checked
Took out all to check for dirt/wet stuff
DME is dry and no dirt
I went as far as to also check the fusible links,. they seem ok and measure good.
Both my cps sensors measure around 500 ohms ( the broken one and the "new" one). I am seriously doubting that new sensor now......

And fuel wise,. i have over a quarter in the tank.

The coil is a single coil ( by the looks of it ) with 4 wires that go to the spark plugs. I do not have a distributor. Engine wise it's the same as sold in the e36 318i (late models)
link to coil picture http://images.esellerpro.com/3394/I/295/93/1603_1.JPG

My car is a 1995 e34 518i automatic ( you know the slow economical one ). But srsly I know it's not the fastest horse in the stallion but I miss my baby. If I can't work it out myself, stealership it is.
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  #15  
Old 12-01-2014, 06:32 PM
capricornbmw capricornbmw is offline
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OK you do not have the distributor cap setup. You have ignition coils, but just not the coil on plug type. There are leads that go from each coil to each spark plug.

OK these are your no-start targets.

Likely : Fuel pump, fuel pump relay, cps, fuel pump fuse. Are you sure your relay is ok ? How did you check that ? Jump the relay and try again (search the forums ).

Less likely : DME, DME relay. ECTS. This is the engine coolant temp sensor. It is usually blue tipped and on your engine should be under the throttle body. Unplug it, crank the engine with the fuel pump fuse out, to ventilate the engine, do this for 5 seconds, then replace the fp fuse, then hold the throttle wide open and crank and see if she starts.

When the ects is busted, it tells the ecu that the engine is arctic cold and the ecu sends too much fuel in and that floods the engine and prevents ignition.

Do you have the bentley manual ? Find the downloadable bentley manual for the e36 as it has your engine.

If you have spark (and I assumed you checked ALL 4 and not just 1), then you cps is good, ecu is good, ecu relay is good, and if you are cranking your battery is good which means power to everything is good. Its probably an issue with fuel delivery, either too much or too little. Cant be too little if the fuel pump is working. It could be too much - chambers are already flooded from the previous attempts and first need to be ventilated or something else, or that ects needs to be unplugged.

btw there are two sensors there - a brown and a blue one. The brown one controls the dash temp gauge and is NOT the ects I'm talking about. If the colours are different on your car then unplug both and see or check the manual first.

The other thing to check (if these simpler test don't produce results) is to see if each of your plugs are good. If they are gummed up hit with carb cleaner and brush clean with a toothbrush. Then check each for spark, before reinstalling it.

Before you reinstall it, insert 10 ccs of engine oil into each spark plug hole. Then crank the engine slowly 1/4 by 1/4 for 3 rotations, then quick crank for 2 seconds to expel the excess oil (put something there to catch the oil flying out or you'll have a mess). This will compensate for bore wash/ cylinder wash, where the oil in the chambers has been fully washed off fuel and thus cannot keep enough compression for ignition to take place.

That's about it really.

Don't bother with the dealer. They know nothing. Better for you to goto an old mechanic. Really.
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  #16  
Old 12-03-2014, 05:09 PM
Lino Martina Lino Martina is offline
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Dear Gentlemen,

First of till now a big thank you for all of your advices, I took time to follow them all and most unfortunate, till now to no avail,...

Checked cps,. good, tried 2 other cps's out of running cars,.. NO START,. sounded weird, just did not want to do anything.
Checked all relays, sensors etc
Checked the broken sensor ( brown thus dash sensor) bought a new one, put it in, ( need it no how ) STILL NADA

meanwhile my cat still running away every time she hears the car turn over,.. some fuel phobia I think,...

So a friend of mine that supplied me with the sensors is standing near the car,. and he thinks, wait let me call a dude that works for BMW,.. he is their chief mechanic here on the island.
That guy comes by in like 10 minutes,.. I turn over the car,.. he looks at the front of the engine and goes,.. SUA ( local language for brother/bro ) ,.. your damper is ****ed up,....... So the whole no start situation is because of the rubber on the pulley, that gave out and thus the cps is not measuring the crank turning and thus the car won't start.

So,. tomorrow I shall go hunt for a new one,... and then,. I shall get back to you all after we put that thing on with a recap and I HOPE some good news.
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  #17  
Old 12-05-2014, 04:30 AM
Lino Martina Lino Martina is offline
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I found a new harmonic balancer and will be installing it later today or tomorrow Ill keep you posted!!
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  #18  
Old 12-16-2014, 02:29 PM
Lino Martina Lino Martina is offline
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Ok, so long story short,.. the m43 engine has 2 types of cranks,.. the old,. AND the new one,.. the balancer i found was the old one, and of course I have the newer crank.
So some searching later ( refusing to pay 400 dollars for it new ), I mean, not being cheap, but thats what I bought the car for :P i found one that does fit

Installed it,. cranked it,. it literally went cha cha cha vroem,.

Im so happy
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